- Update to 8.1.6
* Replace all typing.Dict occurrences to typing.MutableMapping for parameter
hints. #2255
* Improve type hinting for decorators and give all generic types parameters.
* Fix return value and type signature of
shell_completion.add_completion_class function. #2421
* Bash version detection doesn’t fail on Windows. #2461
* Completion works if there is a dot (.) in the program name. #2166
* Improve type annotations for pyright type checker. #2268
* Improve responsiveness of click.clear(). #2284
* Improve command name detection when using Shiv or PEX. #2332
* Avoid showing empty lines if command help text is empty. #2368
* ZSH completion script works when loaded from fpath. #2344.
* EOFError and KeyboardInterrupt tracebacks are not suppressed when
standalone_mode is disabled. #2380
* @group.command does not fail if the group was created with a custom
command_class. #2416
* multiple=True is allowed for flag options again and does not require
setting default=(). #2246, #2292, #2295
* Make the decorators returned by @argument() and @option() reusable when the
cls parameter is used. #2294
* Don’t fail when writing filenames to streams with strict errors. Replace
invalid bytes with the replacement character (�). #2395
* Remove unnecessary attempt to detect MSYS2 environment. #2355
* Remove outdated and unnecessary detection of App Engine environment. #2554
* echo() does not fail when no streams are attached, such as with pythonw on
Windows. #2415
* Argument with expose_value=False do not cause completion to fail. #2336
* Fix an issue with type hints for @click.command(), @click.option(), and
other decorators. Introduce typing tests. #2558